US394323A - Means for transmitting power - Google Patents

Description

(No Model.)

B. P. AUTENRIETH.

MEANS FOR TRANSMITTING POWER.

Patented Dec. 11, 1888.

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UNITED STATES PATENT OFFICE.

ERNST F. AUTENRIETH, OF NEW YORK, ASSIGNOR TO THE GLEN COVE MACHINE COMPANY, (LIMITED,) OF BROOKLYN, (GREEN POINT,) NEIV YORK.

MEANS FOR TRANSMITTING POWER.

SPECIFICATION forming part of Letters Patent No. 394,323, dated December 11, 1888. Application filed August 30,1888. Serial No. 284,175. (No model.)

To all whom it may concern..-

Be it known that I, ERNST F. AUTENRIETH, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Means for Transmitting Motive Power, of which the following a specification.

I will describe my improvement in detail, and then point out the novel features in claims.

In the accompanying drawings, Figure 1 is a side elevation of a portion of a planingmachine to which my improvement is attached, and showing a portion of a frame to which the same attached. Fig. 2 is aplan or top view of the same.

Similar letters of reference designate corresponding parts in both the figures.

A designates a main shaft, which shaft may derive motion in any suitable manner. B designates a pulley keyed upon the main shaft.

O designates a driving-belt passing about the pulley B, and also about an expansionpulley, I), mounted upon a shaft, D. The expansion-pulley I) comprises a frame, D of circular form. The frame I) is provided with tan gentiall y-exten ding slots D of which I have shown four. These slots form guideways for segments 1) of the expansion-pulley proper. The segments 1) are adapted to be moved nearer to or farther from the axis of the pulley along said guideways. The outer edges of the segments D are arc-shaped, and are grooved to receive the belt C.

The inner ends of the segments D have pix otally connected to them links or rods (7. These links or rods extend rearwardly from the expansion-pulley, approximately in line with the direction of movement of the seg ments D", or, in other words, tangential to the axis of rotation of the pulley. At their outer ends the links or rods are pivotally connected to a sleeve or collar, E. The sleeve rotates with the shaft, its rotation being due to a feather, (Z, on the shaft D, which enters a suitable groove in the collar. The said sleeve or collar has a circumferential groove, E, and a yoke, F, is received within said groove. Pivotally connected at one of its ends to said yoke is a bell-crank lever, G, fulcrumed upon a projection j, extending from a frame of a machine or other support. Pivotally connected to the other arm of the bell-crank lever G is one end of a slider-rod, H. The slider-rod H is adapted to slide through a guide, g.

Rigidly secured upon the slider-rod H is a toothed rack, H. The toothed rack engages a sector, I, which sector constitutes one arm of a bell-crank lever, I, fulcrumed upon a stud, 2', extending from the frame of a ma chine or other support. The other arm, 1 of the lever, as shown, has in it a curved or offset portion, c, and then extends beneath and for some distance beyond the fulcrum of the lever. Upon the arm I of the lever is a sliding weight, .I. The curved or offset portion e of the arm I to enable the weight J to be moved into a position directly beneath the fulcrum of the lever, in which posit-ion it is neutral. \Vhen, however, it is moved outwardly along the arm 1 it tends to rock the sector I in such manner as to cause a longitudinal movement of the slider-rod II in the direction of the arrow, Fig. 1, whereby the be1l-crank lever G will be rocked to cause the movement of the collar E away from the expansion'pulley D. The segments D are thus moved nearer the center of the pulley, and the diameter of the expansion-pulley proper is accordingly decreased. This necessarily results in an increase of speed of whatever machinery is driven from the shaft upon which the expansio11-pulley is mounted proportionate to the degree of reduction in diameter of the expansion-pulley, for if the main shaft be driven at a fixed speed and the pulley B be non-expansible it is apparent that decreased diameter of the expansion-pulley will result in increased speed of the latter pulley.

It may here be stated that the centrifugal force of the segments must be sufficient to overcome the pullin -strain of the belt.

IVhen the operation of a machine is about to be started, the speed at which it is desired to run it is first determined. The weight J is then moved to the necessary position on the arm I of the lever I. The machine having been started, centrifugal force will operate to throw the segments D outwardly until the diameter of the expansion-pulley is such as to meet the desired requirements for speed, or until centrifugal force and the power exerted by the weight J counterbalance each other. These two forces connterbalancing each other will maintain the expansion-pulley at an approximately fixed diameter and the speed accordingly uniform.

I have shown means for shifting the weight J, consisting in a cord or rope, f, connected at its ends to opposite sides of the weight and passing about grooved pulleys f f mounted uponthe leverI, and also about a pulley, f mounted upon the stud "i. The pulley f is provided with two circumferential grooves, through one of which the cord or rope f passes. Motion is imparted to the pulley f by a cord or rope, f, passing about said pulley through the other of said grooves, and also about a grooved hand-wheel, f \Vhen the handwheel f is rotated, it will be readily seen that the weight may be slid along on the arm I in either direction.

L designates a grooved wheel comprised in a belt-tightener. The wheel L is mounted upon one arm, L, of a lever having a fulcrum, L and the other arm, L of which forms a handle. This belt-tightener is thrown onto the belt by hand to tighten it for starting the machine, and when it is thrown off the belt is entirely slack and does not drive. The tightener may be secured in the last-mentioned position by springing thehandle into a fixed catch, L

My improvement, although especially designed for use with planing-machines, may be employed with any suitable machine.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, with a driving-shaft, of a pulley on said shaft, another shaft, an expansion-pulley on said second-named shaft, a belt on said pulleys, a lever, and a counterbalance thereon, and connections and gearing, substantially as herein described, between said lever and the expanding members of the expansion-pulley, whereby the said counterbalance is caused to act against the centrifugal force of said expanding members, substantially as herein described.

2. The combination, with a drivin g-shaft, A, a pulley, 13, on said shaft, a second shaft, D, an expansion-pulley, I), on said second shaft, a belt passing about said pulleys, a lever, I, having a fixed fulcrum and comprising a sector, I, a counter-balance on said lever adapted to be moved into different positions thereon, a toothed rack, H, gearing with said sector, and a connection between the said rack and the expanding members of said expansionpulley, substantially as specified.

ERNST F. AUTENRIETH.

itnesses:

FREDK. HAYNES, ARTHUR H. GUMBLIN.

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